Which layer of the eye is also called the uvea?

The layer of the eye known as the uvea is called the vascular tunic. This is a crucial layer as it plays several important roles in eye health and function. The uvea consists of three primary components: the choroid, the ciliary body, and the iris.

The choroid provides nourishment to the outer layers of the retina through its rich blood supply. The ciliary body is responsible for producing the aqueous humor (the fluid in the front part of the eye) and for changing the shape of the lens, which is essential for focusing. The iris controls the amount of light that enters the eye by adjusting the size of the pupil.

This layer is highly vascularized, meaning it contains many blood vessels, which is why it is referred to as the vascular tunic. Understanding the functions and components of the vascular tunic helps comprehend how the eye regulates light intake and maintains clarity in vision.